This general centering issue was filed here: https://bugs.chromium.org/p/chromium/issues/detail?id=598805
For dragging 1px width change: https://bugs.chromium.org/p/chromium/issues/detail?id=598818 See the section below, "Resizing, one pixel at a time".
For the missing resize bars: https://bugs.chromium.org/p/chromium/issues/detail?id=598822 See the section below, "Resize bar is not always available".